Motorcycle



E. V. HAMMOND.

MOTORCYCLE. I APPLICATION FILED NOV. 2!,1916- I 1,339,387, Patented May11, 1920.

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X Kama @222 UNITED STATES PATENT OFFICE.

EDWARD VICTOR HAMMOND, OF BALI-1AM, LONDON, ENGLAND.

MOTORCYCLE.

Application filed November 21, 1916.

To all whom it may concern:

Be it known that I, EDWARD VICTOR HAM- MOND, a subject of the UnitedKingdom of Great Britain, residing at No. 88 Louisville road, Balham, inthe city of London, county of Surrey, England, and Kingdom of GreatBritain, have invented a new and use ful Motorcycle, of which thefollowing is a specification.

The ob 'ect of this invention is to simplify and cheapen the productionof motor cycles, or similar vehicles propelled by water cooled internalcombustion engines, while at the same time affording a very low seatingposition for the rider, (and consequently a low center of gravity) andalso affording that protection fromthe weather hitherto only found onmotor cars.

With reference to the accompanying drawings, Figure 1 represents anelevation of the motor cycle, Fi 2 represents a plan of the base orchassis while Figs. 3, 41, 5, 6 and 7 represent enlarged views ofdetailsof construction.

The principal feature of this invention is the use of the water outletand inlet pipes from the engine to the radiator or cooling tank, to formthe actual frame of the machine; or in other words, to utilize thetubular framework of the motor cycle, as water outlet and inletpipesfrom engineto radiator. In this invention the usual'form of radiator,either honeycomb or composed of layers or coils of tubing may bedispensed with, and a plain cylindrical tank a, Fig. 1, used in itsstead. This tank may be cylindrical, rectangular, streamline, or of anyother shape, and maybe cast in one piece, or formed in any other fashionmost suitable to the manufacturer. The steering column Z2, Fig. 1,passes through the tank a,

which tank is preferably placed in the position shown in Fig. 1; inwhich position it forms the steering head of the bicycle in ad dition tofulfilling its function as a cooling tank. Radiating gills,such as areused. on air cooled petrol engine cylinders, may be placed or formedupon the tank if desired, to assist the cooling. Any other formofradiator or cooling vessel may be used if desired.

The water outlet pipe is shown at c, Fig.

1, and forms the ,top tube of the motorcycle frame. The water inlet pipeis shown at (Z, Fig. 1, and forms the bottom tube of the frame. Theengine, shown at 6, Fig. 1, is

Specification of Letters Patent.

Patented Ma a, 1920.

Serial NO. 132,620.

preferably placed at the rear of the motor cycle and .is utilized aspart of the framework of the motor cycle, as it takes the place of avertical tube or stay. The engine 6, cooling tank a, and pipes o, and(Z, may be disposed in any other position or positions relative to eachother than that shown in Fig. 1, if so desired. The whole frame isstrengthened by a tension rod shown at f, Fig. 1, the tension of the rodbeing adjusted by the turnbuckle g, Fig. 1. The forward end of thetension rod is secured to a lug, or by other suitable means, to the tanka, and the rear end of the rod is secured to one holding down bolt ofthe engine 6, or other suitable anchorage. The engine 6, stands upon theplatform It; this platform It, contains the hollow chamber '6'," whichchamber is used as a silencer for the exhaust gases, and communicateswith the'engine exhaust port by the exhaust pipe 7', Fig. 1. The hollowchamber has a detachable cover plate is, Fig. 1, to admit of readyaccess to the holding down bolts of the engine, and also cleaning outthe silencer. Formed in one piece with the base plate h, is the lug Z,which lug holds a sliding bracket m. The lug and sliding bracket areshown in detail at Fig. 3 of the accompanying drawings. The drive fromthe engine to the rearwheel is by friction contact of a drivingpulley n,Fig. 1, Fig. 2, on the engine, with the tire of the rear wheel of themotor cycle. Owing to the tendency of the friction drive to slip whenthe roads are wet, the sliding bracket m is provided; which bracketholds the spindle or hub of the rear Wheel in the boss 0 Fig. 3; thespindle being secured by the set screw p, Fig. 8, or other suitablemeans. A flat facing, key, or other suitable contrivance may be used onthe sliding bracket m, to prevent it turning about in the lug Z. Upontightening up the nut 9, Fig. 1 and Fig. 3; the rear road wheel 1", Fig.1 and Fig. 2; is drawn hard against the pulley n, thereby increasing thefrictional force between road wheel and pulley, and diminishing thetendency to slip. The base plate 71., lug Z, and hollow chamber 2', are

being secured'to the top frame tube 0, by a clip t, Fig. 1. Steering ispreferably controlled by a motor car type of steering wheel as shown ata, Fig. 1; but any form of tiller or handle bar may be used if desired.

-A substantial footboard or footplate is provided at 1), Fig. 1 and Fig.2, which may be of wood, metal, or other material. In Fig. 1 thefootboard is shown of wood, and is secured by bolts or other suitablemeans, to the forward end of the base plate It; and is supported by ametal strap, clip, or other means from any suitable point along thebottom tube d, or tank a, as shown at w, in Fig. 1. Side and front mudand wind shields to protect the feet and legs of the rider arerepresented by w, m 0 0,, in Fig. 1 and Fig. 2. These wind shields maybe of wood or metal as desired. The front shield m is carried up on eachside of the tank a, to meet the body wind screen y, which wind screen(to protect the body of the rider), may be of wood or metal, and eithercontinuous with the front mud and wind screen 09 or formed in a separatepiece as shown at 1 Fig. 1. This wind screen is surmount ed by a glassface screen a, in the fashion adopted in motor cars. The wind screen 3is carried by a bracket a carried underneath the filler cap 6 Fig. 1, orby other suitable means. The cooling tank a, is filled at a suitableorifice 0 Fig. 1. V

A means of making a water-tight joint where the top and bottom tubes 0,and d, enter the water tank a, is shown in large sized detail in Figs. 4and 5 of the accompanying drawings. In Fig. 1, bosses are provided onthe tank a, as shown at d, and al, Fig. 1, which bosses are strengthenedby the connecting rib 6 Fig. 1. I

A section through one of the bosses is shown at Fig. 4:; al being theboss, and 0, the top (or water outlet) tube.

A recess is formed in the boss 6Z1 as shown at f,, Fig. 4:; and intothis recess is forced a ring 072,, of rubber or other suitable elasticmaterial of larger outside diameter than the recess 71, and of smallerinside diameter than the tube 0, which ring, by pressing upon the sidesof the recess f and also upon the tube 0, will, by reason of itscompression, form a water-tight joint, unaffected by vibration. To holdthe tube 0 in position, a bolt 9 is passed through the boss d at asuitable point shown on the line X. Y. in Fig. 4:, a transverse sectionon the line X. Y. being shown at Fig. 5. On the main boss al additionalbosses h and 7& Fig. 5, are formed. These bosses are provided withrecesses 2' i,, Fig. 5, into which recesses are forced. rings of rubberor other elastic material 7' 7' having precisely the same effect securedby welding, brazing, or' in any other suitable manner. In the lower endof the tubing, (which receives the spindle of the front roadwheel "9there is formed a slot as shown at 0 Fig. 6. This slot receives the endsof the spindle (one on each side of the wheel) as shown at 0 Fig. 7 Thespindle end engages with a slot in a plunger 10 Fig. 7 This plungersupports the lower end of a coiled spring 10 which spring is placedwithin the tube n As will now be clearly seen by reference to Fig. 7 ofthe accompanying drawings, shocks to the front road wheel g will betransmitted through the spindle 0 (which spindle is free to slide up anddown the slot 0 in the tube 12,) to theplunger p whichwill in turncompress the spring p5, thus absorbing the road shock. The fork crown isshown at 7' Fig. 1, and Fig. 7 and a distance piece is shown at 1' Fig.7 which distance piece is used for adjusting the spring 39 This distancepiece can be an elongation of the crown 1- if desired.

WVith further regard to the water cooling, it may be mentioned thatthermo-siphon, or natural circulation, is relied upon to circulate thecooling water, but a pump may be fitted if desired.

I claim- 1. In a motor cycle, a frame including'a tubular steering head,upper and lower tubular members connected to said head, and an enginehaving a water jacket in the angle between and connected to said tubularmembers, so that said water jacket forms afpornected to said tubularmembers, and a foot-1 board having its front end connected to said frameand its rear end secured to said base plate.

3. In a motor cycle, a frame including a steering head and upper andlower reach members attached thereto, an engine having a member attachedto and connecting the rear ends of said reach members and also having abase plate, a rear Wheel having its axle mounted in said base plate, anda drive Wheel on the shaft of the engine and frictionally engaging saidrear Wheel.

4:. In a motor cycle, a frame including a steering head and upper andlower reach members attached thereto, an engine having a member attachedto and connecting the rear ends of said reach members and also having abase plate, a rear Wheel having its axle adjustably mounted in said baseplate, and a drive Wheel on the shaft of the engine and frictionallyengaging said rear Wheel.

haust muflling chamber, an exhaust pipe connecting the engine With saidchamber,

and a rear Wheel having its axle mounted on said base plate.

EDWARD VICTOR HAMMOND.

Witnesses:

F. H. R. KEMSTEAD, G. A. STEPHENS.

